Re: [vps-mail] I Hate Spam! Time for an update.

["Bennett Lanford" <ben@xxxxxxxxxxxxx>]

On Tue, April 12, 2005 3:56 pm, Jonathan Duncan said:
>
> On Tue, 12 Apr 2005, Bennett Lanford wrote:

<snip />

>> I also use greylisting, which blocks about 75% of all incoming mail.
>> (See FreeBSD ports: /usr/ports/mail/milter-greylist )

<snip/>
> I seem to remember you talking about the greylist also.  Is it high
> maintenance?

*No* maintenance ... once you set it up. milter-greylist is very well
written. It requires no MySQL databases (nothing special, actually). A
good overview of greylisting is at
http://projects.puremagic.com/greylisting/ (I don't use that particular
greylisting package--I did initially, though. Now milter-greylist is my
favorite.) There is also a greylisting website at greylisting.org

The only possible drawback is that when a sender *first* sends an e-mail
to a particular recipient on your server, your server returns a
*temporary* failure response, forcing the sending server to queue the mail
until its next queue run (typically 20-60 minutes). Compliant SMTP servers
will all queue the mail and deliver it within that time period. Windows
trojans and most spam generating programs, OTOH, won't try a second time,
so the the SPAM is never delivered. When the mail is finally delivered,
that sender/recipient/IP-address triple is "remembered" for a
(configurable) period of time--typically 5-30 days--so that subsequent
deliveries are instantaneous.

-- 
Bennett Lanford <ben@xxxxxxxxxxxxx>

There are 10 kinds of people: those that understand binary and those that
don't.
======================================================================
This is <vps-mail@xxxxxxxxxxxx>       <http://www.perlcode.org/lists/>
Before posting a question, please search the archives (see above URL).